Wiktionary:Administrators

Administrators, also called admins or sysops (system operators), are editors that have access to special features that help keep Wiktionary running smoothly. They have access to these features because they are trusted by the community, but this does not make them better or more important than anybody else.

A bureaucrat is a slightly higher administrative level than sysop and can perform a few additional functions. Bureaucrats can give and remove sysop permission and grant bureaucrat status to other users after a successful request. They can also "flag" bots, which hides a user's contributions from the new changes and puts them in the bot group.

Prior to 15 September 2014, bureaucrats could rename users locally on their project. That function has then been disabled and a historic log of those actions can be found here.